no code implementations • 5 Jan 2021 • Vincent Van Eylen, N. Astudillo-Defru, X. Bonfils, J. Livingston, T. Hirano, R. Luque, K. W. F. Lam, A. B. Justesen, J. N. Winn, D. Gandolfi, G. Nowak, E. Palle, S. Albrecht, F. Dai, B. Campos Estrada, J. E. Owen, D. Foreman-Mackey, M. Fridlund, J. Korth, S. Mathur, T. Forveille, T. Mikal-Evans, H. L. M. Osborne, C. S. K. Ho, J. M. Almenara, E. Artigau, O. Barragán, F. Bouchy, J. Cabrera, D. A. Caldwell, D. Charbonneau, P. Chaturvedi, W. D. Cochran, S. Csizmadia, M. Damasso, X. Delfosse, J. R. De Medeiros, R. F. Díaz, R. Doyon, M. Esposito, G. Fűrész, P. Figueira, I. Georgieva, E. Goffo, S. Grziwa, E. Guenther, A. P. Hatzes, J. M. Jenkins, P. Kabath, E. Knudstrup, D. W. Latham, B. Lavie, C. Lovis, R. E. Mennickent, S. E. Mullally, F. Murgas, N. Narita, F. A. Pepe, C. M. Persson, S. Redfield, G. R. Ricker, N. C. Santos, S. Seager, L. M. Serrano, A. M. S. Smith, A. Suárez Mascareño, J. Subjak, J. D. Twicken, S. Udry, R. Vanderspek, M. R. Zapatero Osorio
The combination of radius and mass measurements suggests that the innermost planet has a rocky composition similar to that of Earth, while the outer two planets have lower densities.
Earth and Planetary Astrophysics Solar and Stellar Astrophysics
1 code implementation • 26 Feb 2018 • J. Prieto-Arranz, E. Palle, D. Gandolfi, O. Barragán, E. W. Guenther, F. Dai, M. Fridlund, T. Hirano, J. Livingston, P. Niraula, C. M. Persson, S. Redfield, S. Albrecht, R. Alonso, G. Antoniciello, J. Cabrera, W. D. Cochran, Sz. Csizmadia, H. Deeg, Ph. Eigmüller, M. Endl, A. Erikson, M. E. Everett, A. Fukui, S. Grziwa, A. P. Hatzes, D. Hidalgo, M. Hjorth, J. Korth, D. Lorenzo-Oliveira, F. Murgas, N. Narita, D. Nespral, G. Nowak, M. Pätzold, P. Montañés Rodríguez, H. Rauer, I. Ribas, A. M. S. Smith, V. Van Eylen, J. N. Winn
We also find that the planetary bulk compositions are compatible with a scenario where all three planets formed with similar core/atmosphere compositions, and we speculate that while GJ 9827 b and GJ 9827 c lost their atmospheric envelopes, GJ 9827 d maintained its atmosphere, owing to the much lower stellar irradiation.
Earth and Planetary Astrophysics
1 code implementation • 11 May 2017 • E. W. Guenther, O. Barragan, F. Dai, D. Gandolfi, T. Hirano, M. Fridlund, L. Fossati, A. Chau, R. Helled, J. Korth, J. Prieto-Arranz, D. Nespral, G. Antoniciello, H. Deeg, M. Hjorth, S. Grziwa, S. Albrecht, A. P. Hatzes, H. Rauer, Sz. Csizmadia, A. M. S. Smith, J. Cabrera, N. Narita, P. Arriagada, J. Burt, R. P. Butler, W. D. Cochran, J. D. Crane, Ph. Eigmueller, A. Erikson, J. A. Johnson, A. Kiilerich, D. Kubyshkina, E. Palle, C. M. Persson, M. Paetzold, S. Sabotta, B. Sato, St. A. Shectman, J. K. Teske, I. B. Thompson, V. Van Eylen, G. Nowak, A. Vanderburg, R. A. Wittenmyer
The period of the outer planet is 13. 3 days. Although the two planets have similar masses, their densities are very different.
Earth and Planetary Astrophysics